docs: def _download_audio_files(self, records, target_path):
          """
          Download all audio files based on the given records.
          """
  
          for record in records:
              audio_folder = os.path.join(target_path, 'audio', record[2])
              audio_file = os.path.join(audio_folder, '{}.mp3'.format(record[0]))
              os.makedirs(audio_folder, exist_ok=True)
  
              download_url = 'https://audio.tatoeba.org/sentences/{}/{}.mp3'.format(record[2], record[0])
              download.download_file(download_url, audio_file)